| Donostia to Caguas (Puerto Rico) | 4,067.77 mi (6,546.44 km) |
| Donostia to Cahokia (Illinois) | 4,390.18 mi (7,065.32 km) |
| Donostia to Calabasas (California) | 5,763.94 mi (9,276.16 km) |
| Donostia to Caldwell (Idaho) | 5,202.95 mi (8,373.34 km) |
| Donostia to Caledonia (Wisconsin) | 4,125.75 mi (6,639.75 km) |
| Donostia to Calera (Alabama) | 4,456.51 mi (7,172.05 km) |
| Donostia to Calexico (California) | 5,717.53 mi (9,201.47 km) |
| Donostia to Calhoun (Georgia) | 4,317.14 mi (6,947.77 km) |
| Donostia to California (Maryland) | 3,780.52 mi (6,084.16 km) |
| Donostia to California City (California) | 5,681.04 mi (9,142.76 km) |
| Donostia to Callaway (Florida) | 4,525.04 mi (7,282.35 km) |
| Donostia to Calumet City (Illinois) | 4,156.42 mi (6,689.11 km) |
| Donostia to Calverton (Maryland) | 3,774.78 mi (6,074.92 km) |
| Donostia to Camano (Washington) | 5,155.71 mi (8,297.32 km) |
| Donostia to Camarillo (California) | 5,773.03 mi (9,290.79 km) |
